Node.js password salting/hashing

In view of the recent LinkedIn breach, would anyone care to review my data access routines relating to user access?

This is a standard node.js module, accessing a Postgres database.

(function () {

    'use strict';

    var crypto = require('crypto'),
        hash = function (pass, salt) {
            var h = crypto.createHash('sha512');

            h.update(pass);
            h.update(salt);

            return h.digest('base64');
        };

    module.exports.getUser = function (conn, email, password, callback) {
        conn.query({
            name: 'getUser',
            text: 'SELECT "id", "passwordHash" FROM "user" WHERE "email" = $1 LIMIT 1',
            values: [email]
        }, function (err, result) {
            if (err) {
                throw err;
            }
            if (result.rows.length === 0) {
                callback(null);
            } else {
                var newHash = hash(password, email),
                    row = result.rows[0];

                if (row.passwordHash === newHash) {
                    callback({id: row.id, email: email});
                } else {
                    callback(null);
                }
            }
        });
    };

    module.exports.addUser = function (conn, email, password, callback) {
        var newHash = hash(password, email);

        conn.query({
            name: 'addUser',
            text: 'INSERT INTO "user" ("email", "passwordHash") VALUES ($1, $2) RETURNING "id"',
            values: [email, newHash]
        }, function (err, result) {
            var id;

            if (err) {
                console.error(err);
                callback(null);
            } else {
                id = result.rows[0].id;

                callback({id: id, email: email});
            }
        });
    };

}());